Carton stitching machine



Jan. A14, 1941.

A, s. MoR'Row CARTQN STITCHING MACHINE Filed Jan. 8, 13:40v

/Nvf/vron.- Men/QR .5. lyoekow..

ATTORNEY.

Jan. 14, 1941- A. s. MOR-Row 2,228,580

` CARTON s'rITcHING MACHINE v l Filed Jan. 8, 1940 3 Sheets-She'et 5 A T7' ORNE Y.

, stitching machines.

- The pedestal 6 supports an arm 8, see Figures 1 and 4, having at its outer end a stitcher head 9 Paienied'Jsa. 14, 1941 cAa'roN s'rlronma mcnmn Arthur s. Morrow, vancouver, British columbia, v Canada Application .tammy s,- 1940, serial No. 312,921

' 9 Claims. My invention relates to improvements in carton is to provide improvements to single stitch stitching machines whereby the machine may be set to apply any predetermined number of stitches to a carton at properly spaced intervals, to discharge theV carton from under the stitcher lhead and to stop the stitcher head immediately following the placement of said stitches. A further important object is to provide meanswhereby' tie stitches at the ends of each row of stitches.

can be applied in alignment with thel row and 4also be applied with a stitching machinehaving only one stitching head. A further object isto provide means whereby the machine can be altered with little time and'effort to-change the number oi'- stitches to be applied to a fold or carton.

The inventionconsistsof a stitcher having a stitcher head driven .by a source of continuous power, means for moving the work under the stitcher after each stitch is made and devices for operating the stitcher head to apply a predetermined number of stitches before coming to rest, as will be more fully described in the following specification and shown ix the accompanying drawings, in which- Fig. 1 is a side elevational view of the invention showing the stitch timing cam. v I

Fig. 2 is a side elevational view showing the feed and cam driving train. 1

Fig. 3 is a rear view. Fig. 4 is a plan view of the work table with the stitcher head omitted. y Fig. 5 is aplan view of the -eccentric shaft taken on the line'5-5 of Figure 1.

Fig. 6 is a plan view of the cam shaft takenY on the line 6-6 of Figure 3. f

Fig. 7 is a sectional view of theeccentric shaft brake assembly taken on the line 1-1 of Figure 6.

Fig. 8 is an enlarged front view of the feed arm.

Fig. 9 is a detail-showing the stitcher head driven gear and stitcher shaft with the primary drive pulley and gear to the invention.'

Fig. 10 is a detail view ofthe stitch timing cam. In. the drawings like characters of reference indicate corresponding parts in each figure.

`The numeral I indicates a frame vconsisting of vertical supports. 2, connecting longitudinal members 3 and 4 and a work table 5 which overhangs one side as4 shown in Figures 3 and 4. The frame I is formed'around the pedestal 6 of a stitcher generally indicated by the numeral 1.

The object of the invention shown in outline only in Figures 1 and 4, as this may be of any type. At the inner end of the arm 8 a motor I6 is provided which is normally continuously running and which is adapted to drive theA stitcher head 9 through a suitable clutch, not shown, andi a gear Il.' The gear II, obviously continuously rotating with the motor, has its hub I2 freely journalled upon the stitcher head sh'aft I3. A trip rod I4, see Figure 9, connects the clutch to enable the drive to be imparted y10 from the gear II to the stitcher head shaft. The trip rodl is connected by a bell crank I4A anda rod I4B, see Figure 9, to a pedal I5 placed at' the base of the frame I adjacent the operators position. As the trip rod is pressed downwardly the clutch engages by spring action and causes the stitcher head shaft I3 to rotate one complete turn, when the trip I4 and the pedal I5 move upwardly by spring action to disengage the clutch. 'Ifhe stitcher mechanism thus far described is of the existing machine to which the contemplated improvements are attached,

Secured to the hub I2 of the continuously rotating gear .II is a pulley I8 connected by a belt I 9 to a pulley 20. The pulley 20 is secured to a. countershaft 2i which is journalled adjacent one end from an arm 22. The arm 22 is supported above the work table; 5 to enable theV carton stitched to pass under it. The inner end' of the countershaft 2| is ntted with spaced pulleys 23. Between the pulleys 23 and freely journalled upon the shaft is a frame 24 extending towards the stitcher head in the free end of which a shaft 25 having corresponding spaced pulleys 26 is journalled. This shaft 25 is also tted with a feed roll 21. The pulleys 23 and 26 are connected together by V-belts 28, the outer faces of which coact with the feed roll 21 to engage the stitched carton to withdraw it from the machine.' Supportedfrom the frame 24 is a stop 29 whichvis adjusted py any suitable means andis adapted to be engaged by a marginal edge of a box when being put in position under the stitcher head 9.

The feed roll 21 an'd the belts 28 are in contact with the. table when the stitcher head is' at rest and are raised during the stitching process as will be apparent'as the description proceeds.

Supported to the rear ofthe stitcher arm 8 is a rock shaft 32 having a crank 33 at one end anda forked arm 34 at its opposite end. The arm 34 is -connected by links 35 to the frame 24 so that by rocking the shaft 32 through the lever 33 the feed roll 21- may be lowered to contact the carton below it..

Below the table 5 an eccentric shaft 36 is the roller a corresponding movement of the carton takes place until the last depression B6 is above the roller when a short movement of the carton is made and nally as the crown AI rides onto the roller againthe seventh stitch is made, which is obviously closer to the sixth than the sixth is to the fifth. The first and last stitch of the line are referred to in the preamble as tie stitches. When the last stitch is made the cam comes to rest through the instrumentalities previously described. Simultaneous with the stopping of the stitching and spacing mechanism, the feed roll 21 will be dropped towards the table 5, so that the carton now bearing upon a dead roll 19 mounted immediately below the roll 21 will remove the carton from under the stitcher head.

From the above it will be obvious that the tie stitches being placed by `a single immovable stitching head must necessarily be in line with the widely spaced stitches of the row.

What I claim as my invention is:

1. In a carton stitcher having a continuously rotating member, a stitcher head normally at rest and a normally stationary trip adapted to be moved to cause the rotating member to actuate the stitcher head to place a stitch in a carton, means for holding the trip in moved position whereby a plurality of stitches are placed progressively, means formoving the carton t'o space the stitches therein, means for permitting the trip to return v to normal position to stop the stitching, continuously running means adapted to engage the carton simultaneously with the return of the trip to normal position to discharge the stitched carton anda stop carried by the discharge means for locating the carton prior to stitching.

2. In a carton stitcher having a single stitching head, a stitcher head shaft, means actuated from the shaft for causing the head to place a predetermined number of stitches without stopping, means for intermittently moving a carton under the stitcher to space the stitches with the first and last stitches being closer to their adjacent stitches than` adjacent intermittent stitches, said carton moving means consisting of an arm adapted to engage the carton, means for oscillating the arm and a cam for lowering the arm out of carton engaging position.

` 3. In a carton stitcher having a stitcher head, means for setting the machine in motion to place a predetermined number of stitcheameans for stopping the machine when said stitches are placed, a work table, a feed shoe having reciprocatory movement adapted to advance a, carton under the stitcher head after a stitch is made. and means for holding the feed shoe in engaging contact with the carton at different time inter- Avals following the placement of some of the stitches by the stitcher head.

4. In a carton stitcher having a stitcher head, means for setting the machine in motion to place a predetermined number o f stitches. means for stopping the machine when said stitches are placed. a work table, a feed arm provided with a feed shoe, said feed shoe being adapted to advance a carton under the stitcher after each stitch -is made, said arm being oscillatingly .mounted below the table, cam means for lowering the arm and its shoe, and spring means for raising said shoe into contact withza carton being stitched upon the table, said cam being adapted to retract the feed shoe from carton engaging position for different time intervals following the placement of some of the stitches bythe stitcher head.

5. In-a carton stitcher as.c1aimed in claim 4, said cam having a plurality of depressions serving to raise the fulcrum of the feed arm, some of said depressions being longer than others. 6. In a carton stitcher comprising a work table, a stitcher head, a stitcher shaft, a continuously rotating member clutch connected to said stitcher shaft to drive it and a trip to disconnect the clutch from the stitcher shaft after the placement of each stitch, a cam for holding the clutch connected through the trip during the placement of a plurality of stitches and to release the trip and disconnect the clutch when said stitches are placed, continuously rotating elements movable above the work table beyond the stitcher head, an operating linkage between the cam and the rotating elements, said cam serving to hold the elements in raised position during the placement of the stitches and to permit said elements to engage the carton to discharge it when said stitches are placed.

'7. In a carton stitcher having a Work table, a stitcher head, a stitcher shaft, a continuously rotating member clutch connected to said stitcher shaft to drive it and a trip to disconnect the clutch after the placement of a predetermined lnumber of stitches and an oscillating arm having a shoe 4adapted to engage the carton to advance it to space the stitches, and means for moving the arm to vary the duration of carton engagement whereby the spacing between adjacent stitches is varied. y

'8. In a carton stitcher having a stitcher head, means for setting the machine in motion to place a predetermined number of stitches, means for stopping the machine when said stitches are placed, a work table, a feed arm provided with a feed shoe for engaging the carton to advance it under the stitcher head, said feed shoe being mounted upon a pivot adjacent its base, variable throw means for oscillating the feed arm and its shoe, a cam for lowering the feed arm and means for raising the shoe into engagement with the carton.

9. In a carton stitcher having a work table, a stitcher head above the work table, means for feeding a carton under the stitcher head during the stitching operation, and a frame having rotating elements for. removing the carton after stitching and a stop carried by said frame adapted to descend into the path of anl unstitched ARTHUR S. MORROW. 

